Promi Big Brother is a spin-off of the German reality television series Big Brother, broadcast in Germany. It is airing on Sat.1, it involves a group of celebrities, called housemates, living in isolation from the outside world in a custom-built "house". The actions of the participants are recorded constantly by microphones and cameras situated in each room. Regularly, the housemates nominate one or two other members of the group each to face eviction; those with the most nominations face a public telephone vote, and the housemate who receives the most public votes is evicted. This procedure continues until the final day, when the viewers vote for who of the remaining participants they want to win the programme.